KR19990078282A - Topsheet for body fluids absorbent article - Google Patents

Topsheet for body fluids absorbent article Download PDF

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Publication number
KR19990078282A
KR19990078282A KR1019990010417A KR19990010417A KR19990078282A KR 19990078282 A KR19990078282 A KR 19990078282A KR 1019990010417 A KR1019990010417 A KR 1019990010417A KR 19990010417 A KR19990010417 A KR 19990010417A KR 19990078282 A KR19990078282 A KR 19990078282A
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South Korea
Prior art keywords
surface sheet
density
fibrous layer
fibrous
body fluid
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KR1019990010417A
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Korean (ko)
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KR100590456B1 (en
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시미즈신고
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다카하라 게이이치로
유니챰 가부시키가이샤
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/593—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives to layered webs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • A61F2013/15406—Basis weight
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • A61F2013/15422—Density
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24281—Struck out portion type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • Y10T428/24322—Composite web or sheet

Abstract

본 발명은 복수개의 투액성 개공(6)을 갖는 체액 흡수성 물품의 표면 시이트에 관한 것으로, 상기 표면 시이트는 상대적으로 밀도가 낮은 상부 섬유층과 상대적으로 밀도가 높은 하부 섬유층을 포함한다. 상기 개공(6)의 주위에는 제1 및 제2 섬유층(11 및 12)이 서로 일체화되어 표면 시이트(2)의 상면으로부터 하면을 향하여 밀도가 점진적으로 높아지고, 하면의 근방에서 밀도는 제2 섬유층(12)보다 더 높아진다. 따라서, 상기 표면 시이트(2)를 갖는 물품을 사용하는 중에 상기 표면 시이트의 상면은 건조한 상태로 유지될 수 있다.The present invention relates to a surface sheet of a bodily fluid absorbent article having a plurality of liquid permeable pores 6, wherein the surface sheet includes a relatively low density upper fiber layer and a relatively high density lower fiber layer. The first and second fiber layers 11 and 12 are integrated with each other around the opening 6 so that the density gradually increases from the upper surface of the surface sheet 2 toward the lower surface. Higher than 12). Thus, the top surface of the surface sheet can be kept dry while using the article having the surface sheet 2.

Description

체액 흡수성 물품의 표면 시이트{TOPSHEET FOR BODY FLUIDS ABSORBENT ARTICLE}Surface sheet of body fluid absorbent article {TOPSHEET FOR BODY FLUIDS ABSORBENT ARTICLE}

본 발명은 일회용 기저귀, 실금용 패드, 배변 훈련용 팬츠, 생리용 냅킨 등의 체액 흡수성 물품의 표면 시이트에 관한 것이다.The present invention relates to a surface sheet of a body fluid absorbent article such as disposable diapers, incontinence pads, training pants, and sanitary napkins.

일본 특허 공보 평4-152945호에 기재된 상기 목적용의 표면 시이트는 열가소성 합성 수지로 제조된 것으로, 이 시이트는 상면(上面)으로부터 하면(下面) 방향으로 연재하는 복수개의 도액관이 있다. 이 도액관 각각의 하단부는 주변 벽보다 더 높은 밀도를 갖는다.The surface sheet for the purpose described in Japanese Patent Application Laid-open No. Hei 4-152945 is made of a thermoplastic synthetic resin, and the sheet has a plurality of liquid crystal tubes extending in a direction from an upper surface to a lower surface. The lower end of each of these liquid conduits has a higher density than the peripheral wall.

공지의 표면 시이트는, 표면 시이트 위의 체액이 섬유 밀도가 상대적으로 낮은 표면 시이트 부위로부터 섬유 밀도가 상대적으로 높은 표면 시이트 부위로 신속하게 이동하는 특성을 이용한 것이다. 구체적으로, 표면 시이트의 도액관을 관통한 체액은 밀도가 상대적으로 높은 도액관의 하단부를 향하여 이동한다. 이들 하단부는 통상 체액 흡수성 물품의 액체 흡수성 코어와 밀접하게 접촉 상태를 유지하므로, 체액은 하단부로부터 흡수성 코어로 신속하게 이동한다. 이러한 표면 시이트를 사용하는 체액 흡수성 물품은 착용자에게 불쾌한 습윤감을 주지않으면서 체액이 흡수성 코어로 신속하게 흡수되도록 한다. 그러나, 상기 물품을 사용하는 중에 액체 흡수성 코어에 착용자의 체중이 가해지면 체액은 흡수성 코어로부터 착용자의 피부로 역류하게 된다.Known surface sheets utilize the property that the bodily fluid on the surface sheet moves rapidly from the surface sheet portion having a relatively low fiber density to the surface sheet portion having a relatively high fiber density. Specifically, the body fluid that has penetrated the liquid crystal tube of the surface sheet moves toward the lower end of the liquid crystal tube having a relatively high density. These lower ends usually remain in intimate contact with the liquid absorbent core of the body fluid absorbent article, so that the body fluid moves quickly from the lower part to the absorbent core. Body fluid absorbent articles using such surface sheets allow body fluids to be quickly absorbed into the absorbent core without giving the wearer an unpleasant wetting feeling. However, if the wearer's weight is applied to the liquid absorbent core while using the article, the body fluid will flow back from the absorbent core to the wearer's skin.

전술한 바와 같은 문제점의 측면에서, 본 발명의 목적은 체액의 역류에 기인한 불편감을 경감시키는 동시에 표면 시이트에 의해 얻어지는 유리한 특성은 유지하여, 체액이 액체 흡수성 코어로 신속하게 이동될 수 있도록 개선시킨 표면 시이트를 제공하는 것이다.In view of the problems as described above, the object of the present invention is to reduce the discomfort caused by the backflow of body fluids while maintaining the advantageous properties obtained by the surface sheet, improving the body fluids to be quickly transferred to the liquid absorbent core. It is to provide a surface sheet.

도 1은 생리용 냅킨의 부분 파단 사시도.1 is a partially broken perspective view of a sanitary napkin.

도 2는 도 1에 도시한 생리용 냅킨의 주요부 단면도.FIG. 2 is a sectional view of an essential part of the sanitary napkin shown in FIG. 1; FIG.

본 발명에 따라, 체액 흡수성 물품의 표면 시이트는 착용자의 피부에 당접하는 상면, 상기 상면의 아래에 있는 하면, 상기 상면과 하면 사이에 연재하는 복수개의 투액성 개공을 포함하고, 상기 표면 시이트는 제1 섬유층으로 형성되는 상부와 제1 섬유층의 밀도보다 더 높은 밀도를 갖는 제2 섬유층으로 형성되는 하부를 갖으며, 상기 개개의 개공 주위는 상기 제1 및 제2 섬유층이 서로 일체화되어 상기 표면 시이트의 밀도가 상면으로부터 하면을 향하여 점차로 증가되며, 적어도 하면의 근방은 제2 섬유층의 밀도보다 더 높은 밀도를 갖는다.According to the present invention, a surface sheet of a body fluid absorbent article includes an upper surface contacting a wearer's skin, a lower surface below the upper surface, and a plurality of liquid permeable apertures extending between the upper surface and the lower surface, wherein the surface sheet is made of a first sheet. A first fibrous layer and a bottom formed by a second fibrous layer having a higher density than that of the first fibrous layer, each of the periphery of the opening having the first and second fibrous layers integrated with each other to The density gradually increases from the upper surface toward the lower surface, and at least the vicinity of the lower surface has a higher density than the density of the second fiber layer.

본 발명의 제1 실시 형태에 있어서, 제1 섬유층의 하면과 제2 섬유층의 상면은 열용융형 접착제에 의해 서로 간헐적으로 결합된다.In the first embodiment of the present invention, the lower surface of the first fiber layer and the upper surface of the second fiber layer are intermittently bonded to each other by a hot melt adhesive.

본 발명의 제2 실시 형태에 있어서, 제1 섬유층과 제2 섬유층은 친수성이고, 상기 제2 섬유층은 제1 섬유층의 친수성 보다 친수성이 더 강하다.In the second embodiment of the present invention, the first fiber layer and the second fiber layer are hydrophilic, and the second fiber layer is more hydrophilic than the hydrophilicity of the first fiber layer.

본 발명의 제3 실시 형태에 있어서, 제1 섬유층은 소수성이고, 제2 섬유층은 친수성이다.In the third embodiment of the present invention, the first fiber layer is hydrophobic and the second fiber layer is hydrophilic.

본 발명의 제4 실시 형태에 있어서, 제1 및 제2 섬유층 중 적어도 하나는 부직포로 제조된다.In a fourth embodiment of the present invention, at least one of the first and second fibrous layers is made of nonwoven fabric.

본 발명의 제5 실시 형태에 있어서, 제1 섬유상 웨브의 기본 중량은 10 내지 30 g/m2이고, 제2 섬유상 웨브의 기본 중량은 10 내지 100 g/m2이며 밀도는 제1 섬유상 웨브의 1.3배 이상이다.In a fifth embodiment of the present invention, the basis weight of the first fibrous web is 10 to 30 g / m 2 , the basis weight of the second fibrous web is 10 to 100 g / m 2 and the density of the first fibrous web is 1.3 times or more.

본 발명에 따른 표면 시이트는 착용자의 피부에 당접하는 상부 섬유층, 이 상부 섬유층의 밀도보다 더 높은 밀도를 갖는 하부 섬유층 및 개공을 포함하는데, 상기 개공 각각은 이들의 주변 벽 뿐만 아니라 그 근방에서 상기 표면 시이트의 상면으로부터 하면을 향해 점차적으로 증가되는 밀도를 갖는다. 이러한 특징은 체액이 흡수성 코어를 향하여 용이하게 이동하는데 도움이 된다. 더욱이, 체액이 흡수성 코어로부터 부분적으로 삼출되어 밀도가 상대적으로 낮은 표면 시이트의 상면으로 역류되기는 어렵다. 이러한 표면 시이트의 상면은 늘 건조한 상태로 유지될 수 있으므로, 종래의 체액 흡수 물품의 착용자가 흔히 겪는 불쾌한 습윤감을 효과적으로 경감시킬 수 있다.The surface sheet according to the invention comprises an upper fibrous layer abutting the wearer's skin, a lower fibrous layer having a higher density than the density of the upper fibrous layer, and openings each of which has a surface in the vicinity thereof as well as its peripheral wall. It has a density gradually increasing from the top surface of the sheet toward the bottom surface. This feature helps the body fluid to move easily towards the absorbent core. Moreover, it is difficult for the body fluid to partially extrude from the absorbent core and flow back to the upper surface of the relatively low density surface sheet. Since the top surface of such a surface sheet can be kept dry at all times, it can effectively alleviate the unpleasant wetness commonly experienced by the wearer of the conventional body fluid absorbent article.

본 발명에 따른 체액 흡수성 물품의 표면 시이트에 대한 상세한 설명은 첨부한 도면을 참조하여 이하에서 상세히 설명하고자 한다.Detailed description of the surface sheet of the body fluid absorbent article according to the present invention will be described in detail below with reference to the accompanying drawings.

도 1은 본 발명에 따른 표면 시이트를 채택한 체액 흡수성 물품의 구체예로서 도시한 생리용 냅킨의 사시도이다. 상기 냅킨(1)은 본 발명에 따른 투액성 표면 시이트(2), 불투액성 이면 시이트(3) 및 이들 양 시이트(2,3) 사이에 위치하는 액체 흡수성 코어(4)를 포함한다. 상기 표면 시이트(2)와 이면 시이트(3)는 상기 흡수성 코어(4)의 단부를 지나 더 길게 연재되고 서로 겹쳐져서 겹친 부분에서 함께 결합된다.1 is a perspective view of a sanitary napkin shown as a specific example of a body fluid absorbent article employing a surface sheet according to the present invention. The napkin 1 comprises a liquid-permeable surface sheet 2 according to the invention, an impermeable backing sheet 3 and a liquid absorbent core 4 positioned between these two sheets 2, 3. The surface sheet 2 and the back sheet 3 extend together beyond the ends of the absorbent core 4 and are joined together in overlapping portions.

표면 시이트(2)는 개공의 직경이 0.2 내지 5 mm, 더욱 바람직하게는 0.5 내지 3 mm인 복수개의 개공(6)이 형성된 섬유 집합체로 구성된다. 이들 개공(6)이 각각 실질적으로 원형 단면으로 간주될 수 있는 한, 인접한 개공들(6)의 각 쌍의 중심간 거리는 0.5 내지 20 mm, 더욱 바람직하게는 0.7 내지 10 mm이다. 이면 시이트(3)는 플라스틱 시이트로 제조되고, 흡수성 코어(4)는 분쇄 펄프 섬유와 초흡수성 중합체 분말의 혼합물로 제조된다.The surface sheet 2 is composed of a fiber assembly in which a plurality of openings 6 are formed, the diameter of the openings being 0.2 to 5 mm, more preferably 0.5 to 3 mm. The distance between the centers of each pair of adjacent apertures 6 is 0.5 to 20 mm, more preferably 0.7 to 10 mm, as long as these apertures 6 can each be regarded as substantially circular cross sections. The back sheet 3 is made of plastic sheet and the absorbent core 4 is made of a mixture of ground pulp fibers and superabsorbent polymer powder.

도 2은 냅킨(1)의 주요부를 도시한 단면도이다. 도 2에서 표면 시이트(2)는 착용자의 피부에 당접하는 상부 섬유층(11) 및 흡수성 코어(4)와 접촉하도록 제1 섬유층(11)의 아래에 있는 하부 섬유층(12)을 포함한다. 상기 제1 섬유층(11)은 열가소성 섬유의 웨브, 바람직하게는 권축되어 복합 섬유가 서로 기계적으로 교락하거나 또는 열봉된 것, 더욱 바람직하게는 부직포 등의 부직 섬유 시이트로 형성되고, 이들 중 어느 것이나 섬도는 1 내지 6 데니어이고, 기본 중량은 10 내지 30 g/m2이다. 제1 섬유층(11)은 소수성이고, 소수성 상태로 사용되거나 또는 친수성이 되도록 처리한 후에 사용할 수 있다. 제2 섬유층(12)은 복수의 열가소성 합성 섬유로 형성되는데, 각각의 섬도는 1 내지 10 데니어이고, 서로 기계적으로 교락되거나 또는 열봉되며, 바람직하게는 부직포 형태로 제공되는데, 어느 경우나 기본 중량은 10 내지 100 g/m2이고, 밀도는 제1 섬유층(11) 밀도의 1.3배 이상이다. 제2 섬유층(12)은 소수성이고, 소수성 상태로 사용될 수 있으나, 제1 섬유층(11)의 친수성 보다 더 강한 친수성을 갖도록 처리한 후에 사용하는 것이 더욱 바람직하다. 제1 섬유층(11) 및 제2 섬유층(12)은 열용융형 접착제(13)에 의해 함께 간헐적으로 결합되는 반면, 이들 섬유층(11, 12)의 섬유들은 상기 접착제(13)를 사용하는 대신 기계적으로 교락되거나 또는 열봉 기술에 의해 서로 결합될 수 있다. 개공(6)의 주변 벽(14)과 그 근방부를 따라 표면 시이트(2)의 밀도는 이들의 상면으로부터 하면을 향하여 점진적으로 증가되고, 적어도 상기 하면 뿐만 아니라 그 근방부에서 상기 표면 시이트(2)의 밀도는 제2 섬유층(12)의 밀도보다 더 높다.2 is a cross-sectional view showing the main part of the napkin 1. In FIG. 2 the surface sheet 2 comprises an upper fibrous layer 11 abutting the wearer's skin and a lower fibrous layer 12 below the first fibrous layer 11 to contact the absorbent core 4. The first fibrous layer 11 is formed of a web of thermoplastic fibers, preferably crimped so that the composite fibers are mechanically entangled or sealed with each other, more preferably a nonwoven fibrous sheet such as a nonwoven fabric, any of which are fine Is 1 to 6 deniers and the basis weight is 10 to 30 g / m 2 . The first fiber layer 11 is hydrophobic and may be used in a hydrophobic state or after being treated to be hydrophilic. The second fibrous layer 12 is formed of a plurality of thermoplastic synthetic fibers, each fineness of 1 to 10 denier, mechanically entangled or enclosed with each other, preferably provided in the form of a nonwoven fabric, in which case the basis weight is 10 to 100 g / m 2 , and the density is at least 1.3 times the density of the first fiber layer 11. The second fibrous layer 12 is hydrophobic and can be used in a hydrophobic state, but it is more preferable to use the second fibrous layer 11 after treatment to have a stronger hydrophilicity than the hydrophilicity of the first fibrous layer 11. The first fibrous layer 11 and the second fibrous layer 12 are intermittently joined together by a hot melt adhesive 13, while the fibers of these fibrous layers 11, 12 are mechanically bonded instead of using the adhesive 13. Can be entangled with or combined with each other by heat-sealing techniques. The density of the surface sheet 2 along the periphery wall 14 of the opening 6 and its vicinity gradually increases from their upper surface toward the lower surface, and at least the lower surface as well as the surface sheet 2 in the vicinity thereof. The density of is higher than the density of the second fibrous layer 12.

전술한 바와 같이 제작된 표면 시이트(2)는 제1 섬유층(11)으로부터 체액을 신속하게 이동시키는데 유리한데, 상기 제1 섬유층의 친수성 및 밀도는 둘다 제2 섬유층(12)보다 상대적으로 작고, 상기 제2 섬유층의 친수성 및 밀도는 상대적으로 높아서, 표면 시이트의 상면이 건조한 상태로 유지되기 쉽다. 제2 흡수층(12)에 의해 흡수된 체액의 양은 제2 섬유층(12) 아래에 있는 흡수성 코어(4)에 부분적으로 흡수되고, 나머지 부분은 흡수성 코어(4)에 의해 흡수되기 전에 제2 섬유층(12) 내에 횡방향으로 확산된다. 개개의 개공(6)의 근방에서, 체액은 밀도구배가 증가하는 방향, 즉 표면 시이트(2)의 상면으로부터 하면 및 흡수성 코어(4)를 향하는 방향으로 이동된다. 이러한 방식에서, 체액은 표면 시이트(2)의 상면으로부터 하면 및 흡수성 코어(4)를 향하여 이동되는 경향이 있어서, 체액이 장시간 동안 표면 시이트(2)의 상면에 체류하는 것을 방지하게 되어 표면 시이트(2)의 상면은 건조한 상태로 신속하게 회복될 수 있다. 이미 체액이 흡수된 흡수성 코어(4)에 착용자의 체중이 가해지면, 이들 체액의 일부가 표면 시이트(2)의 상면으로 삼출되는 일이 가끔 있다. 그러나, 본 발명의 중요한 특징은 표면 시이트(2)의 밀도가 제2 섬유층(12)으로부터 제1 섬유층(11)으로 점진적으로 감소되어, 흡수성 코어(4)로부터 부분적으로 삼출된 체액이 제1 섬유층(11)으로 역류되어 결과적으로 착용자의 피부에 도달하는 것을 방지할 수 있다는데 있다. 따라서, 흡수성 코어(4)가 체액으로 흡수된 후에도, 표면 시이트(2)의 상면은 건조한 상태로 유지된다.The surface sheet 2 fabricated as described above is advantageous for rapidly moving body fluids from the first fibrous layer 11, wherein both the hydrophilicity and the density of the first fibrous layer are relatively smaller than the second fibrous layer 12, and The hydrophilicity and density of the second fiber layer are relatively high, so that the upper surface of the surface sheet tends to be kept dry. The amount of body fluid absorbed by the second absorbent layer 12 is partially absorbed by the absorbent core 4 under the second fiber layer 12, and the remaining portion is absorbed by the second fiber layer (before absorbed by the absorbent core 4). 12) and spread laterally. In the vicinity of the individual openings 6, the body fluid is moved in the direction in which the density gradient increases, i.e., from the upper surface of the surface sheet 2 toward the lower surface and the absorbent core 4. In this manner, the body fluid tends to move from the upper surface of the surface sheet 2 toward the lower surface and the absorbent core 4, thereby preventing the body fluid from remaining on the upper surface of the surface sheet 2 for a long time. The upper surface of 2) can be quickly restored to a dry state. When the wearer's weight is applied to the absorbent core 4 which has already absorbed body fluid, some of these body fluids are sometimes exuded to the upper surface of the surface sheet 2. However, an important feature of the present invention is that the density of the surface sheet 2 is gradually reduced from the second fibrous layer 12 to the first fibrous layer 11, so that the body fluid partially exuded from the absorbent core 4 is first fibrous layer. It is possible to prevent the flow back to (11) and consequently reach the wearer's skin. Therefore, even after the absorbent core 4 is absorbed into the body fluid, the upper surface of the surface sheet 2 is kept dry.

따라서, 냅킨의 착용자는 표면 시이트(2)의 상면이 건조한 상태로 남아있으므로 불쾌한 습윤감을 느끼지 못한다.Therefore, the wearer of the napkin does not feel uncomfortable wetness because the upper surface of the surface sheet 2 remains dry.

본 발명의 표면 시이트는 하부 섬유층의 밀도가 상부 섬유층의 밀도보다 높고, 또 개구 부위에는 주변 벽과 그 근방의 밀도가 표면 시이트의 상면에서 하면을 향하여 높아져서 체액이 코어에 근접하는 방향으로 이동하기 쉽다. 코어에서 삼출된 체액은 밀도가 상대적으로 낮은 표면 시이트의 상면을 향하여 이동하기 어렵다. 이러한 표면 시이트는 상면이 늘 건조한 상태를 유지하므로 착용자에게 불쾌한 습윤감을 경감시킨다.In the surface sheet of the present invention, the density of the lower fibrous layer is higher than the density of the upper fibrous layer, and the density of the peripheral wall and its vicinity is increased toward the lower surface from the upper surface of the surface sheet at the opening, so that the body fluid is likely to move in the direction close to the core. . Body fluids exuded from the core are difficult to move toward the upper surface of the surface sheet having a relatively low density. This surface sheet keeps the top surface dry at all times, thereby reducing the unpleasant wetness to the wearer.

Claims (6)

착용자의 피부에 당접하는 상면(上面),Upper surface abutting on the wearer's skin, 상기 상면의 아래에 있는 하면(下面),The lower surface below the upper surface, 상기 상면과 하면 사이에 연재하는 복수개의 투액성 개공을 포함하는 체액 흡수성 물품의 표면 시이트로서,As a surface sheet of a body fluid absorbent article comprising a plurality of liquid permeable pores extending between the upper and lower surfaces, 상기 표면 시이트는 제1 섬유층으로 형성되는 상부(上部)와, 상기 제1 섬유층의 밀도보다 더 높은 밀도를 갖는 제2 섬유층으로 형성되는 하부(下部)를 가지며,The surface sheet has an upper portion formed of a first fibrous layer and a lower portion formed of a second fibrous layer having a higher density than that of the first fibrous layer, 상기 개개의 개공 주변은, 상기 제1 및 제2 섬유층이 서로 일체화되어 상기 표면 시이트의 밀도가 상기 상면으로부터 상기 하면을 향하여 점차로 증가되며, 적어도 상기 하면 근방에서는 밀도가 상기 제2 섬유층의 밀도보다 더 높은 것을 특징으로 하는 체액 흡수성 물품의 표면 시이트.In the periphery of the respective openings, the first and second fibrous layers are integrated with each other so that the density of the surface sheet gradually increases from the upper surface toward the lower surface, and at least near the lower surface, the density is greater than the density of the second fibrous layer. A surface sheet of a body fluid absorbent article, characterized in that high. 제1항에 있어서, 상기 제1 섬유층의 하면과 상기 제2 섬유층의 상면은 열용융형 접착제 수단에 의해 서로 간헐적으로 결합되는 것인 체액 흡수성 물품의 표면 시이트.The surface sheet of the body fluid absorbent article according to claim 1, wherein the lower surface of the first fiber layer and the upper surface of the second fiber layer are intermittently bonded to each other by hot melt adhesive means. 제1항에 있어서, 상기 제1 섬유층과 상기 제2 섬유층은 둘다 친수성이고, 상기 제2 섬유층의 친수성은 상기 제1 섬유층의 친수성 보다 더 강한 것인 체액 흡수성 물품의 표면 시이트.The surface sheet of claim 1, wherein both the first fibrous layer and the second fibrous layer are hydrophilic, and the hydrophilicity of the second fibrous layer is stronger than the hydrophilicity of the first fibrous layer. 제1항에 있어서, 상기 제1 섬유층은 소수성이고, 상기 제2 섬유층은 친수성인 것인 체액 흡수성 물품의 표면 시이트.The surface sheet of claim 1, wherein the first fibrous layer is hydrophobic and the second fibrous layer is hydrophilic. 제1항에 있어서, 상기 제1 및 제2 섬유층 중 하나 이상은 부직포로 제조되는 것인 체액 흡수성 물품의 표면 시이트.The surface sheet of body fluid absorbent article according to claim 1, wherein at least one of the first and second fibrous layers is made of a nonwoven fabric. 제1항에 있어서, 상기 제1 섬유상 웨브의 기본 중량은 10 내지 30 g/m2이고, 상기 제2 섬유상 웨브의 기본 중량은 10 내지 100 g/m2이며 밀도는 상기 제1 섬유상 웨브 밀도의 1.3배 이상인 것인 체액 흡수성 물품의 표면 시이트.The method of claim 1, wherein the basis weight of the first fibrous web is 10 to 30 g / m 2 , the basis weight of the second fibrous web is 10 to 100 g / m 2 and the density is of the first fibrous web density The surface sheet of a body fluid absorbent article which is 1.3 times or more.
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US6274218B1 (en) 2001-08-14
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CA2265282A1 (en) 1999-09-26
SG81967A1 (en) 2001-07-24

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